I'am puzzled about what "Callback" do and how!

"wuzs" <yepkora@hotmail.com> wrote:
A callback is just a pointer to a function that you hand to someone else.
When that other function needs you to perform some service or report some
status, it "calls back" into your function.

They aren't commonly used in device drivers, however. You might want to
find a different newsgroup.
--
- Tim Roberts, timr@probo.com
Providenza & Boekelheide, Inc